Updated: July, 2025

Best thermos flasks

Save up to 39% Off

1

THERMOS

9.9

Exceptional

Thermos Stainless King Vacuum-Insulated Food Jar with 2 Storage Container Inserts, 47 Ounce, Matte Steel

15% Off

Why we love it

Keeps food hot or cold for hours.

Includes convenient storage containers.

Highly durable and reliable.

Main highlights

Vacuum Insulation Technology
Keeps food hot for 10 hours and cold for 24 hours, ideal for on-the-go meals.

Perfect for Outdoor Adventures
Includes two microwave and dishwasher safe containers, great for hikes.

Durability Praised by Customers
Extremely durable 18/8 stainless steel praised for lasting quality.

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How do we rank?

How do we rank
Our AI-powered platform ranks products using multiple weighted factors from millions of products and user reviews across the web, providing the most valuable and real data. Higher scores rank first.
2

Thermoflask

9.8

Exceptional

Thermoflask 12 oz Double Wall Insulated Food Jar, 2-Pack, Mint + Sherbet/Tangerine + Mint

Main highlights

Temp-Lock Technology: Keeps food hot for up to 7 hours or cold for up to 14 hours.

Leak-Proof and Portable: The screw-on lid ensures a secure, leak-proof seal, with an easy-grip handle for convenient carrying on-the-go.

Dishwasher Friendly: This dishwasher safe jar is BPA-Free, combining safety and convenience for everyday use.

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3

THERMOS

9.7

Exceptional

THERMOS Stainless King Vacuum-Insulated Beverage Bottle, 40 Ounce, Matte Stainless Steel

Why we love it

Excellent temperature retention for 24 hours.

Durable stainless steel construction.

Convenient twist-and-pour stopper.

Main highlights

Temperature Retention
THERMOS vacuum insulation keeps beverages hot or cold for 24 hours, ideal for long trips.

Outdoor Adventures
Perfect for outdoor adventures, road trips, and group outings with 40-ounce capacity.

Superior Heat Retention
Customers praise its ability to keep drinks hot for extended periods.

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4

THERMOS

9.5

Excellent

THERMOS Stainless King Vacuum-Insulated Compact Bottle, 16 Ounce, Matte Steel

29% Off

Why we love it

Keeps drinks hot or cold for hours.

Durable stainless steel construction.

Leak-proof design with easy pouring.

Main highlights

Temperature Retention
THERMOS vacuum insulation keeps beverages hot for 18 hours or cold for 24 hours.

Outdoor Adventures
Ideal for outdoor activities, ensuring drinks stay at the right temperature.

Leak-Proof Performance
Customers praise its ability to prevent leaks and maintain heat.

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5

THERMOS

9.4

Excellent

Thermos Vacuum Insulated 16 Ounce Compact Stainless Steel Beverage Bottle

Why we love it

Excellent temperature retention.

Compact and portable.

Durable stainless steel construction.

Main highlights

Temperature Retention
Thermos vacuum insulation keeps beverages hot for 12 hours or cold for 24.

Ideal for On-the-Go
Compact design with built-in cup, perfect for travel and work.

Highly Praised Heat Retention
Customers love its ability to keep drinks hot for hours.

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6

MILTON

9.3

Excellent

Milton Thermosteel Flip Lid 500, Double Walled Vacuum Insulated Thermos 500 ml | 16 oz | 24 Hours Hot and Cold Water Bottle with Cover, Stainless Steel, BPA Free, Leak Proof | Silver

39% Off

Why we love it

Keeps drinks hot or cold for 24 hours.

Convenient one-handed flip lid design.

Durable and stylish stainless steel build.

Main highlights

24 Hour Temperature Retention
The Milton Thermosteel Bottle maintains beverage temperatures for 24 hours with double-wall vacuum insulation and copper lining.

Perfect for Active Lifestyles
Ideal for gym, office, or outdoor adventures, keeping your beverages ready anytime.

Highly Praised Lid Design
Customers appreciate the flip lid for easy, one-handed operation and its practicality.

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7

Thermoflask

9.0

Excellent

ThermoFlask 24 oz Double Wall Vacuum Insulated Stainless Steel 2-Pack of Water Bottles, White / Coral

Main highlights

Reusable Bottle & Lid: Experience versatility with our insulated water bottle featuring both chug and straw lids for your convenience

Durable Reusable Bottle Construction: These water bottles are made from food-grade 18/8 stainless steel, ensuring long-lasting use

Bottles with Spill-Proof Design: Enjoy easy, leak-proof sipping with this 2-pack of spill-proof water bottles and secure lids

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8

THERMOS

8.8

Very Good

THERMOS Stainless King Vacuum-Insulated Drink Bottle, 24 Ounce, Matte Steel

Why we love it

Keeps drinks hot or cold efficiently.

Durable stainless steel construction.

User-friendly lid prevents spills.

Main highlights

Temperature Retention
THERMOS vacuum insulation keeps beverages hot for 18 hours or cold for 24 hours.

Ideal for Outdoor Use
Perfect for outdoor adventures, ensuring drinks stay fresh and at optimal temperature.

User-Friendly Design
Praised for its smooth flow lid design that prevents spills and ensures easy drinking.

More info
9

THERMOS

8.7

Very Good

THERMOS FUNTAINER 16 Ounce Stainless Steel Vacuum Insulated Bottle with Wide Spout Lid, Neon Pink

25% Off

Main highlights

STAYS COLD: THERMOS vacuum insulation technology keeps drinks cold for up to 12 hours. Our kids water bottles are built so their drinks are as cool on the inside as they look on the outside. Not for hot liquids

KID-FRIENDLY DESIGN: Choose from a variety of fun colors or patterns! This water bottle is lightweight and compact with a push button lid so it’s easy to carry and open. The integrated carry handle features a soft touch grip

DURABLE FOR DAILY USE: High quality 18/8 stainless steel construction is built to handle drops, dings and assorted roughhousing. You can pop your FUNTAINER water bottle in the dishwasher, though washing by hand is recommended

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10

THERMOS

8.5

Good

THERMOS Stainless King Vacuum-Insulated Food Jar with Spoon, 16 Ounce, Matte Stainless Steel

23% Off

Why we love it

Keeps food hot or cold for hours.

Durable stainless steel construction.

Includes convenient folding spoon.

Main highlights

Vacuum Insulation Technology
THERMOS vacuum insulation keeps food hot up to 9 hours and cold up to 14 hours.

Ideal for On-the-Go Meals
Perfect for school lunches, camping trips, and office meals without a microwave.

Praised Durability
Customers appreciate the 18/8 stainless steel construction for its durability and reliability.

More info

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Our top pick

1
15% Off

Thermos Stainless King Vacuum-Insulated Food Jar with 2 Storage Container Inserts, 47 Ounce, Matte Steel
The THERMOS Stainless King Vacuum-Insulated Food Jar is a versatile and robust solution for keeping your meals at the perfect temperature, whether you're at work or enjoying outdoor adventures. With its vacuum insulation technology, this food jar maintains hot meals for up to 10 hours and cold foods for up to 24 hours, making it ideal for those who lack microwave access during the day. It comes with two 20-ounce containers that are microwave and dishwasher safe, allowing for easy meal separation and preparation. The jar's 18/8 stainless steel construction ensures it's durable enough for any environment, from the office to the wilderness. Customers consistently praise its lasting quality and functionality, making it a worthwhile investment for anyone seeking a reliable food storage solution. Its sweat-proof exterior and large 47-ounce capacity add to its practicality, offering both style and substance for your meal storage needs.

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